289 research outputs found

    Uncertainty in runtime verification : a survey

    Get PDF
    Runtime Verification can be defined as a collection of formal methods for studying the dynamic evaluation of execution traces against formal specifications. Aside from creating a monitor from specifications and building algorithms for the evaluation of the trace, the process of gathering events and making them available for the monitor and the communication between the system under analysis and the monitor are critical and important steps in the runtime verification process. In many situations and for a variety of reasons, the event trace could be incomplete or could contain imprecise events. When a missing or ambiguous event is detected, the monitor may be unable to deliver a sound verdict. In this survey, we review the literature dealing with the problem of monitoring with incomplete traces. We list the different causes of uncertainty that have been identified, and analyze their effect on the monitoring process. We identify and compare the different methods that have been proposed to perform monitoring on such traces, highlighting the advantages and drawbacks of each method

    Model checking sur des pipelines de stream processing

    Get PDF
    L’event stream processing (ESP) est le traitement d’un flux continu d’objets, appelĂ© sĂ©quence d’évĂ©nements, dans l’optique de l’analyser ou de le transformer. Le laboratoire d’informatique formelle de l’UQAC (LIF) dĂ©veloppe depuis plusieurs annĂ©es un moteur de stream processing open source appelĂ© BeepBeep 3. Cet engin permet une utilisation facile du concept d’ESP. À BeepBeep 3, on y a intĂ©grĂ© un systĂšme de vĂ©rification formelle. Avec seulement quelques lignes de code supplĂ©mentaires, il est maintenant possible de gĂ©nĂ©rer automatiquement une structure de Kripke d’une chaĂźne de processeurs donnĂ©e. Des applications intĂ©ressantes s’ajoutent donc Ă  l’utilitĂ© dĂ©jĂ  vaste de BeepBeep. Comparer des pipelines Ă  l’aide de formules en logique temporelle linĂ©aire (LTL) ou en logique du temps arborescent (CTL) et l’idĂ©e qu’une chaĂźne de processeurs monitore une structure de Kripke ne sont que quelques exemples. Dans ce mĂ©moire, on expliquera tout le processus de rĂ©flexion et d’exĂ©cution qui a menĂ© Ă  l’automatisation de la construction d’une chaĂźne de processeur BeepBeep en un modĂšle de Kripke valide pour analyse dans le logiciel NuXMV

    DĂ©tection des Ă©carts de tendance et analyse prĂ©dictive pour le traitement des flux d’évĂ©nements en temps rĂ©el

    Get PDF
    Les systĂšmes d’information produisent diffĂ©rents types de journaux d’évĂ©nements. Les donnĂ©es historiques contenues dans les journaux d’évĂ©nements peuvent rĂ©vĂ©ler des informations importantes sur l’exĂ©cution d’un processus mĂ©tier. Le volume croissant de ces donnĂ©es collectĂ©es, pour ĂȘtre utile, doit ĂȘtre traitĂ© afin d’extraire des informations pertinentes. Dans de nombreuses situations, il peut ĂȘtre souhaitable de rechercher des tendances dans ces journaux. En particulier, les tendances calculĂ©es par le traitement et l’analyse de la sĂ©quence d’évĂ©nements gĂ©nĂ©rĂ©s par plusieurs instances du mĂȘme processus servent de base pour produire des prĂ©visions sur les exĂ©cutions actuelles du processus. L’objectif de cette thĂšse est de proposer un cadre gĂ©nĂ©rique pour l’analyse des tendances sur ces flux d’évĂ©nement, en temps rĂ©el. En premier lieu, nous montrons comment des tendances de diffĂ©rents types peuvent ĂȘtre calculĂ©es sur des journaux d’évĂ©nements en temps rĂ©el, Ă  l’aide d’un cadre gĂ©nĂ©rique appelĂ© workflow de distance de tendance. De multiples calculs courants sur les flux d’évĂ©nements s’avĂšrent ĂȘtre des cas particuliers de ce flux de travail, selon la façon dont diffĂ©rents paramĂštres de flux de travail sont dĂ©finis. La suite naturelle de l’analyse statique des tendances est l’usage des algorithmes d’apprentissage. Nous joignons alors les concepts de traitement de flux d’évĂ©nements et d’apprentissage automatique pour crĂ©er un cadre qui permet le calcul de diffĂ©rents types de prĂ©dictions sur les journaux d’évĂ©nements. Le cadre proposĂ© est gĂ©nĂ©rique : en fournissant diffĂ©rentes dĂ©finitions Ă  une poignĂ©e de fonctions d’évĂ©nement, plusieurs types de prĂ©dictions diffĂ©rents peuvent ĂȘtre calculĂ©s Ă  l’aide du mĂȘme flux de travail de base. Les deux approches ont Ă©tĂ© mises en oeuvre et Ă©valuĂ©es expĂ©rimentalement en Ă©tendant un moteur de traitement de flux d’évĂ©nements existant, appelĂ© BeepBeep. Les rĂ©sultats expĂ©rimentaux montrent que les Ă©carts par rapport Ă  une tendance de rĂ©fĂ©rence peuvent ĂȘtre dĂ©tectĂ©s en temps rĂ©el pour des flux produisant jusqu’à des milliers d’évĂ©nements par seconde

    Evaluating ecosystem interventions for improved health outcomes - The case of the Volta Estuary mangroves and malaria

    Get PDF
    Degradative alteration of ecological systems worldwide is progressing at a time when their influence on human wellbeing is becoming more evident. For some ecosystems and aspects of wellbeing, more concrete knowledge exists. Insights into the science of mangrove-health relationships are however limited and fragmented, with no assessments of human perspectives around these phenomena. This study investigated the nature of the mangrove-human health nexus by assessing the impacts of mangrove ecosystem interventions on health-related ecosystem goods and services and self-reported malaria experiences. Using a mix of methods comprising a systematic literature review, key informant interviews, health questionnaires and Qualitative Comparative Analysis (QCA), this study merges three bodies of work. Research participant viewpoints were synthesised regarding the evolution of mangrove characteristics and use patterns over time, and how these are affected by ecosystem restoration. Survey respondents were also engaged in a recall exercise of malaria experiences over the same period, to provide a basis for causal inference analysis using QCA methodology. Results show that mangrove dependence is declining with ecosystem degradation in Ghana, but ecosystem restoration can modulate some negative health impacts of mangrove degradation, such as infectious disease risk and threats to protein nutrition. Further, specific ecological conditions elicited by ecosystem interventions work together diversely to decrease malaria incidence, but mainly to amplify benefits of current malaria vector control interventions. The causal relationships reveal that certain aspects of wetland restoration can be strengthened to deliver conditions that improve consequences of current malaria management strategies. Environment and health managers must collaborate in policy reorientation, monitoring, evaluation, and capacity building to realise more tangible scientific evidence and sustainable cross-sector outcomes. Ecosystem interventions could plug the shortfalls arising from resource constraints in health policy implementation, towards more uniform outcomes especially in marginal communities

    2009 GREAT Day Program

    Get PDF
    SUNY Geneseo’s Third Annual GREAT Day.https://knightscholar.geneseo.edu/program-2007/1003/thumbnail.jp

    Program and Proceedings: The Nebraska Academy of Sciences 1880-2023. 142th Anniversary Year. One Hundred-Thirty-Third Annual Meeting April 21, 2023. Hybrid Meeting: Nebraska Wesleyan University & Online, Lincoln, Nebraska

    Get PDF
    AERONAUTICS & SPACE SCIENCE Chairperson(s): Dr. Scott Tarry & Michaela Lucas HUMANS PAST AND PRESENT Chairperson(s): Phil R. Geib & Allegra Ward APPLIED SCIENCE & TECHNOLOGY SECTION Chairperson(s): Mary Ettel BIOLOGY Chairpersons: Lauren Gillespie, Steve Heinisch, and Paul Davis BIOMEDICAL SCIENCES Chairperson(s): Annemarie Shibata, Kimberly Carlson, Joseph Dolence, Alexis Hobbs, James Fletcher, Paul Denton CHEM Section Chairperson(s): Nathanael Fackler EARTH SCIENCES Chairpersons: Irina Filina, Jon Schueth, Ross Dixon, Michael Leite ENVIRONMENTAL SCIENCE Chairperson: Mark Hammer PHYSICS Chairperson(s): Dr. Adam Davis SCIENCE EDUCATION Chairperson: Christine Gustafson 2023 Maiben Lecturer: Jason Bartz 2023 FRIEND OF SCIENCE AWARD TO: Ray Ward and Jim Lewi

    Improving the sustainability of coal SC in both developed and developing countries by incorporating extended exergy accounting and different carbon reduction policies

    Get PDF
    In the age of Industry 4.0 and global warming, it is inevitable for decision-makers to change the way they view the coal supply chain (SC). In nature, energy is the currency, and nature is the source of energy for humankind. Coal is one of the most important sources of energy which provides much-needed electricity, as well as steel and cement production. This manuscript-based PhD thesis examines the coal SC network as well as the four carbon reduction strategies and plans to develop a comprehensive model for sustainable design. Thus, the Extended Exergy Accounting (EEA) method is incorporated into a coal SC under economic order quantity (EOQ) and economic production quantity (EPQs) in an uncertain environment. Using a real case study in coal SC in Iran, four carbon reduction policies such as carbon tax (Chapter 5), carbon trade (Chapter 6), carbon cap (Chapter 7), and carbon offset (Chapter 8) are examined. Additionally, all carbon policies are compared for sustainable performance of coal SCs in some developed and developing countries (the USA, China, India, Germany, Canada, Australia, etc.) with the world's most significant coal consumption. The objective function of the four optimization models under each carbon policy is to minimize the total exergy (in Joules as opposed to Dollars/Euros) of the coal SC in each country. The models have been solved using three recent metaheuristic algorithms, including Ant lion optimizer (ALO), Lion optimization algorithm (LOA), and Whale optimization algorithm (WOA), as well as three popular ones, such as Genetic algorithm (GA), Ant colony optimization (ACO), and Simulated annealing (SA), are suggested to determine a near-optimal solution to an exergy fuzzy nonlinear integer-programming (EFNIP). Moreover, the proposed metaheuristic algorithms are validated by using an exact method (by GAMS software) in small-size test problems. Finally, through a sensitivity analysis, this dissertation compares the effects of applying different percentages of exergy parameters (capital, labor, and environmental remediation) to coal SC models in each country. Using this approach, we can determine the best carbon reduction policy and exergy percentage that leads to the most sustainable performance (the lowest total exergy per Joule). The findings of this study may enhance the related research of sustainability assessment of SC as well as assist coal enterprises in making logical and measurable decisions

    The Adirondack Chronology

    Get PDF
    The Adirondack Chronology is intended to be a useful resource for researchers and others interested in the Adirondacks and Adirondack history.https://digitalworks.union.edu/arlpublications/1000/thumbnail.jp

    The Future of Coral Reefs

    Get PDF
    This volume contains a series of papers prepared for presentation at the 14th International Coral Reef Symposium, originally planned for July 2020 in Bremen, Germany, but postponed until 2021 (online) and 2022 (in person) because of the COVID-19 pandemic. It contains a series of papers illustrating the breadth of modern studies on coral reefs and the response of the reef science community to the threats that coral reefs now face, above all from climate change. The first group of papers focus on the biology of a selection of reef organisms, ranging from sea fans to coral dwelling crabs. The next group describe studies of coral communities and ecological interactions in regions as diverse as Florida, Kenya, Colombia, and Norway. Further papers describe investigations into the effects of global warming (in the Maldives and in Timor-Leste) and of other impacts (UV blockers, ocean acidification). The final two papers describe the latest applications of satellite and camera technology to the challenge of mapping and monitoring reefs

    Design for amelioration : leveraging a human-centered approach in designing a sustainable product-service system for Jakarta’s urban poor.

    Get PDF
    This research is an investigation into sustainable product-service systems in addressing the problems of the poor. The focus of this research is the poor population of Jakarta that live in slums located close to river banks, canals, and drainage areas. This study is built upon relevant literature on design for the base of the pyramid, design for sustainability, and sustainable design guidelines and tools. The main objective of this research is to understand how human-centered design, combined with sustainable product-service system design, can help ameliorate some of the issues experienced by the poor. The methodology is predominantly modelled on the approach of human-centered design (HCD). Participatory methods, being important aspects of the human-centered design methodology, are central to this research. The key participatory aspect of this study was the partnership with the Indonesian Street Children Organization Foundation, a non-governmental organization already active in many slum areas in Jakarta. A pilot study to test the methods and confirm the feasibility of the study was conducted before proceeding with the actual fieldwork. The fieldwork itself was conducted over six months, in situ in Jakarta. Participants comprise different groups of the slum community: adolescents, parents, and community workers. The fieldwork was conducted in three stages; adhering to the human-centered design process. First, a series of semi-structured interviews with the assistance of visual tools, to gain insights into slum inhabitants’ living situations as well as their aspirations. Second, a co-creation session was conducted collectively with the inhabitants, where they actively participated in the design process of generating a solution. The co-designed solution took the form of a clean water service that offered an alternative payment of recyclable materials. The prototype was then deployed and tested in the community itself for a period of time. Finally, in the third session, a live prototyping session was conducted, followed by a focus group discussion and product usability interview with the servicepersons who operated the prototype and performed the water service during the testing period. The last session was a platform where participants offered suggestions on ways to improve the solution. Upon discovering the inadequacies of available sustainable design tools, a new framework of a more comprehensive sustainable design tool called the Design for Amelioration was devised. This proposition, which represents an integration of human-centered design methodology and design for sustainability principles, was then used to assess the solution generated in the fieldwork as well as the design process as a whole. Lastly, the Design for Amelioration framework was then further developed to be an appropriate approach that can tackle the challenges of designing for communities
    • 

    corecore